How to copy part of an array to another array in C

Question

How can I copy a part of an array to another array   Consider I m having  int   a    1 2 3 4 5     Now if I give the start index and end index of the array a it should get copied to another array   Like if I give start index as 1 and end index as 3  the elements 2  3  4 should get copied in the new array

User · Answer

See this question  LINQ Take   and Skip   are the most popular answers  as well as Array CopyTo      A purportedly faster extension method is described here

User · Answer

int   b   new int 3   Array Copy a  1  b  0  3      a   source array 1   start index in source array b   destination array 0   start index in destination array 3   elements to copy

User · Answer

In case if you want to implement your own Array Copy method   Static method which is of generic type    static void MyCopy lt T gt  T   sourceArray  long sourceIndex  T   destinationArray  long destinationIndex  long copyNoOfElements       long totaltraversal   sourceIndex   copyNoOfElements    long sourceArrayLength   sourceArray Length       to check all array s length and its indices properties before copying   CheckBoundaries sourceArray  sourceIndex  destinationArray  copyNoOfElements  sourceArrayLength      for  long i   sourceIndex  i  lt  totaltraversal  i                 destinationArray destinationIndex      sourceArray i                  Boundary method implementation   private static void CheckBoundaries lt T gt  T   sourceArray  long sourceIndex  T   destinationArray  long copyNoOfElements  long sourceArrayLength                        if  sourceIndex  gt   sourceArray Length                                throw new IndexOutOfRangeException                              if  copyNoOfElements  gt  sourceArrayLength                                throw new IndexOutOfRangeException                              if  destinationArray Length  lt  copyNoOfElements                                throw new IndexOutOfRangeException

User · Answer

Note  I found this question looking for one of the steps in the answer to how to resize an existing array    So I thought I would add that information here  in case anyone else was searching for how to do a ranged copy as a partial answer to the question of resizing an array   For anyone else finding this question looking for the same thing I was  it is very simple   Array Resize lt T gt  ref arrayVariable  newSize     where T is the type  i e  where arrayVariable is declared   T   arrayVariable    That method handles null checks  as well as newSize  oldSize having no effect  and of course silently handles the case where one of the arrays is longer than the other   See the MSDN article for more

User · Answer

int   a    1 2 3 4 5    int    b  new int a length     New Array and the size of a which is 4  Array Copy a b a length     Where Array is class having method Copy  which copies the element of a array to b array   While copying from one array to another array  you have to provide same data type to another array of which you are copying

[c#] How to copy part of an array to another array in C#?

Examples related to c#

Examples related to arrays